func enable()

in Sources/XCRemoteCache/Commands/Prepare/Integrate/LLDBInitPatcher.swift [69:110]
35 lines of code
8 McCabe index (conditional complexity)

    func enable() throws {
        var finalLines: [String]
        let xcrcLLDBCommandArray = [Self.preambleString, lldbCommand]
        if let content = try? fileAccessor.contents(atPath: fileLocation.path) {
            let contentString = String(data: content, encoding: .utf8)!
            let originalContentLines = contentString.components(separatedBy: .newlines)
            var contentLines = originalContentLines
            let preambleIndices = findIndices(in: contentLines, value: Self.preambleString)

            if !preambleIndices.isEmpty {
                let firstLLDBCommandIndex = preambleIndices[0] + 1
                if firstLLDBCommandIndex >= contentLines.count {
                    // corrupted file, append the script line at the bottom
                    contentLines.append(lldbCommand)
                } else {
                    if preambleIndices.count == 1 && contentLines[firstLLDBCommandIndex] == lldbCommand {
                        // the file content is already valid
                        return
                    }
                    contentLines[firstLLDBCommandIndex] = lldbCommand
                }

                // Delete excessive XCRC lldb commands
                for index in preambleIndices.dropFirst().reversed() {
                    let rangeEnd = min(index + 1, contentLines.count - 1)
                    contentLines.removeSubrange(index...rangeEnd)
                }
            } else {
                contentLines += xcrcLLDBCommandArray
            }
            finalLines = contentLines
        } else {
            finalLines = xcrcLLDBCommandArray
        }
        // Save to disk
        if finalLines.suffix(xcrcLLDBCommandArray.count) == xcrcLLDBCommandArray {
            // always end with empty line when appending a command at the bottom
            finalLines.append("")
        }
        let finalContent = finalLines.joined(separator: "\n").data(using: .utf8)
        try fileAccessor.write(toPath: fileLocation.path, contents: finalContent)
    }